.nav-box {
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 100;
}

.nav-bar {
  position: fixed;
  width: 100%;
  color: #000;
  text-align: center;
  z-index: 100;
}

.return-img {
  position: absolute;
  width: 30rpx;
  height: 30rpx;
  left: 32rpx;
  top: 50%;
  margin-top: -15rpx;
}

.goHome-img {
  position: absolute;
  width: 50rpx;
  height: 50rpx;
  left: 32rpx;
  top: 50%;
  margin-top: -15rpx;
}

.bgc {
  color: red;
}